The Effect of Steel Fiber on Some Mechanical Properties of Self Compacting Concrete

Abstract

Self compacting concrete (SCC) is compacting itself alone due to its self-weight and is filled almost completely while flowing in the formwork. In structural members with high percentage of reinforcement ,it fills also completely all voids and gaps. The purpose of presented research is to investigate, the fresh properties of Steel Fiber SCC and the hardened properties. Fresh properties comprising flow ability, passing ability, and viscosity related segregation resistance. Hardened properties comprising compressive strength, splitting tensile strength, flexural strength, modulus of elasticity, and Ultrasonic pulse velocity. The results indicated of the fresh properties of SCC with steel fiber , reduction in workability with increase of steel fiber content. Also the Steel fibers had effect on compressive & tensile strength , modulus of elasticity and ultrasonic pulse velocity of steel fiber self compacting concrete, there was an optimum content of steel fiber at which higher performance obtained at the both mentioned characteristics ,the content was(0.75-1)% . All fiber mixes demonstrated higher splitting tensile strength, and flexural strength relative to plain mix at all curing ages. The strengths increased as the fiber content increased. The fibers slightly decrease the U.P.V followed the same behavior as in compressive strength of SCC.

Assessment of factors influencing mechanical properties of steel fiber reinforced self-compacting concrete

“…2, there is considerable conflicting evidence on the effect of fiber for measured strength at a given fiber factor. Some investigators found negligible effects [11,12,30,31], a number of them stated that the ratio of (CS SFR /CS plain ) is improved [4,13,16,[32][33][34] Güneyisi et al [13] Khaloo et al [3] Fig. 2, it can be concluded that the fiber factor is significantly influence the compressive strength.…”

Fi̇berle Güçlendi̇ri̇lmi̇ş Si̇li̇s Dumani İçeren Betonlarin Yarmada Çekme Dayaniminin Gep İle Tahmi̇ni̇

“…GEP modelinin eğitim, test ve doğrulama kümelerinde NY, C, SD, S, D max , K, A, SA, V f , L f ve d f değerleri girdi olarak kullanılırken, f yçd değerleri çıktı olarak kullanılmıştır. Modelde, bilimsel literatür [16][17][18][19][20]'den elde edilen 137 deney sonucundan, 91 tanesi eğitim için, 46 tanesi de test için, geriye kalan eğitim ve test kümesinde kullanılmayan bilimsel literatür [21][22][23]'den elde edilen 49 tane deney sonucu da doğrulama için kullanılmıştır. Modelde kullanılan girdi ve çıktı verileri ile ilgili daha fazla bilgi bilimsel literatürler [16][17][18][19][20][21][22][23]'den elde edilebilir.…”

“…Bu çalışmada, çelik fiberle güçlendirilmiş silis dumanı içeren betonların f çyd değerlerinin tahmininde kullanılan GEP modelinin eğitim, test ve doğrulama kümelerinde, farklı literatürden [16][17][18][19][20][21][22][23] elde edilen numunelerin yaşı, beton karışım miktarları ve çelik fiberin özellikleri girdi değişkenleri olarak ve f çyd deney sonuçları da çıktı değişkeni olarak kullanılmıştır. Bu deneysel verilerdeki numune yaşı, beton karışım miktarları ve f çyd değerlerinin karşılaştırılması Şekil 3'te verilmiştir.…”

“…Özellikle silis dumanı içeren numunelerde bu artışın daha da fazla olduğunu gözlemişlerdir. Al-Ameeri [18] kendiliğinden yerleşen betonun bazı mekanik özellikleri üzerine çelik fiberin etkisini araştırmıştır. Karışımlarda çelik fiberleri % 0,00, 0,50, 0.75, 1,00, 1,25 ve 1,50 hacimce kullanmışlardır.…”

A Critical Review on Experimental Studies of Strength and Durability Properties of Fibre Reinforced Concrete Composite

“…Impact energy of concrete was found to be slightly more when hooked end steel was used compared to crimped steel. The effect of steel fibre on some mechanical propertied of self compacting concrete was studied by Abbas AL-Ameeri [20] purposed to investigate the fresh properties of steel fibre SCC and the hardened properties. He drew to the conclusion that the flow ability as well as blocking ratios both decreases with the increase in steel fibre also the slump flow time and Vfunnel flow time increase with the increase in steel fibre.…”